若不考虑微粒形状对于空位形成能的影响，最终计算的空位形成能的误差可达10%。
If one neglects the particle shape effect on the vacancy formation energy, the error in the final results may reach 10%.
而不同的石墨烯面之间存在的表面能可以通过在晶界处形成空位或者位错环而得到降低。
The interface energy that exists between the sheets could be minimized by the grain boundaries by the formation of dislocations or pairs of rings.
从固体的表面张力出发，求得空位的形成能。
The formation energy of vacancy is calculated from, the surface tension of solid.
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